Tunable broadband metamaterial absorber consisting of ferrite slabs and a copper wire

doi:10.1088/1674-1056/21/3/038501

中国物理B ›› 2012, Vol. 21 ›› Issue (3): 38501-038501.doi: 10.1088/1674-1056/21/3/038501

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇下一篇

杨拥军,黄勇军,文光俊,钟靖平,孙海斌

收稿日期:2011-10-21 修回日期:2011-11-16 出版日期:2012-02-15 发布日期:2012-02-15
通讯作者: 黄勇军,yongjunh@uestc.edu.cn E-mail:yongjunh@uestc.edu.cn

Tunable broadband metamaterial absorber consisting of ferrite slabs and a copper wire

Yang Yong-Jun(杨拥军), Huang Yong-Jun(黄勇军)^†, Wen Guang-Jun(文光俊), Zhong Jing-Ping(钟靖平), Sun Hai-Bin(孙海斌), and Oghenemuero Gordon

Key Laboratory of Broadband Optical Fiber Transmission & Communication Networks, School of Communication and Information Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China

Received:2011-10-21 Revised:2011-11-16 Online:2012-02-15 Published:2012-02-15
Contact: Huang Yong-Jun,yongjunh@uestc.edu.cn E-mail:yongjunh@uestc.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 60571024).

摘要/Abstract

Abstract: A tunable broadband metamaterial absorber is demonstrated at microwave frequencies in this paper. The metamaterial absorber is composed of ferrite slabs with large resonance beamwidths and a copper wire. The theoretical analysis for the effective media parameters is presented to show the mechanism for achieving the perfect absorptivity characteristic. The numerical results of transmission, reflectance, and absorptivity indicate that the metamaterial absorber exhibits a near perfect impedance-match to free space and a high absorptivity of 98.2% for one layer and 99.97% for two layers at 9.9 GHz. The bandwidth with the absorptivity above 90% is about 2.3 GHz. Moreover, the absorption band can be shifted linearly in a wide frequency range by adjusting the magnetic bias. This metamaterial absorber opens a way to prepare perfectly matched layers for engineering applications.

Key words: broadband metamaterial absorber, tunability, ferrite

中图分类号: (Ferrite and garnet devices)

85.70.Ge

41.20.Jb (Electromagnetic wave propagation; radiowave propagation) 42.25.Bs (Wave propagation, transmission and absorption)

杨拥军,黄勇军,文光俊,钟靖平,孙海斌. [J]. 中国物理B, 2012, 21(3): 38501-038501.

Yang Yong-Jun(杨拥军), Huang Yong-Jun(黄勇军), Wen Guang-Jun(文光俊), Zhong Jing-Ping(钟靖平), Sun Hai-Bin(孙海斌), and Oghenemuero Gordon . Tunable broadband metamaterial absorber consisting of ferrite slabs and a copper wire[J]. Chin. Phys. B, 2012, 21(3): 38501-038501.

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Tunable broadband metamaterial absorber consisting of ferrite slabs and a copper wire

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